This article describes the work being done by scientists to determine the origin of water found in Earth's oceans. A supplemental exploration of the Herschel Space Observatory is included. The article is targeted to children ages 10-12.

This question is addressed through a series of questions and answers, each providing related introductory information such as how climate change is studied, the history of Earth’s climate, and the effects of climate change on Earth’s geology and...(View More) biology. The Climate Kids website is a NASA education resource featuring articles, videos, images and games focused on the science of climate change.(View Less)

This introductory textbook chapter presents data demonstrating decreased global biodiversity and its link to human activity. The resource includes a field-based student investigation of local biodiversity, links to current news articles, and an...(View More) essay-based unit assessment. A teacher's guide supports classroom use. This is chapter 1 in the unit, Losing Biodiversity, is about the endangerment and extinction of entire species of plants and animals throughout the world due to human actions. The resource is part of Global System Science (GSS), an interdisciplinary course for high school students that emphasizes how scientists from a wide variety of fields work together to understand significant problems of global impact.(View Less)

In this problem set, learners will analyze a table of the length of day (hours) and the number of days per year on Earth in past eras. They will calculate future values, plot some of the data and identify the rate of increase. Answer key is...(View More) provided. This is part of Earth Math: A Brief Mathematical Guide to Earth Science and Climate Change.(View Less)

This is a lesson about discerning fact and fiction in news articles. Learners will read tabloid articles about meteorites and decide if the information is fact or fiction. Questions, extensions, and advanced preparation and procedural tips are...(View More) included. This is lesson 19 of 19 in Exploring Meteorite Mysteries.(View Less)

This is a lesson about the effects of large impacts. Learners will use critical thinking skills to evaluate and apply data from a narrative to a scientific selection process, will demonstrate or visualize simulations of some of the effects of a huge...(View More) impact, and will write a point of view narrative. Materials and vocabulary lists, and advanced preparation and procedural tips are included. This is lesson 14 of 19 in Exploring Meteorite Mysteries.(View Less)

Learners will read about large historical meteors and meteorites falls, discuss the effects on people, and compare their reactions with those in recorded history. Suggestions for student mapping and vocabulary words are included. This is lesson 15...(View More) of 19 in Exploring Meteorite Mysteries.(View Less)